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New Member

Persistent Channel 13 Dynamic Channel Assigment (DCA)

Dear WiFi Experts,

Why is AP still choosing channel 13 when Dynamic Channel Assigment is enabled and channels 1,6,11 are the only channels selected/checked in the DCA list?

Can't the AP choose only 1, 6, and 11 and nothing more?

WLC country code is set to SA (Saudi Arabia).

WLC code 7.0.98




VIP Purple

HI ,It chooes the best

HI ,

It chooes the best channel.


Just info:

Here is the list of channels (and frequencies) of the ISM (industrial, scientific and medical band) (2.4 GHz) used in the WiFi technology:

Channel 1: 2.412 MHz        
Channel 2: 2.417 MHz        
Channel 3: 2.422 Mhz        
Channel 4: 2.427 Mhz        
Channel 5: 2.432 Mhz        
Channel 6: 2.437 Mhz        
Channel 7: 2.442 Mhz        
Channel 8: 2.447 Mhz        
Channel 9: 2.452 Mhz        
Channel 10: 2.457 MHz        
Channel 11: 2.462 MHz        
Channel 12: 2.467 MHz        
Channel 13: 2.472 MHz        
Channel 14: 2.484 MHz


If you want then you can manually change Channle per AP:

Here is the process:

1. Login WLC GUI

2. Go to Wireless > Access Points > 802.11a/802.11b then on far right side of AP from drop dpwn menu click on configure.

Under RF channel assignment you can change the channle manually.



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New Member

thanks for your reply,

thanks for your reply, Sandeepchoudhary21!

But why is it choosing channel 13 when it is not checked as one of the channels to choose from.

1,6 and 11 are the only channels selected on the DCA list.

but some AP's still chooses channel 13. and when that happens, clients, which do not recognize channel 13, are unable to access the wlan.

The AP is having the part number AIR-LAP1131AG-E-K9 and the controller is set to SA as country code.


New Member

Good day!

Good day!

Do You resolve this problem? I have the same issue. I have WLC 5508 + AP 1552. Sometime some APs set 13 channel though all clients doesn't support it. Just 1,6,11 channels are selected on the DCA list. To change 13 channel I need to reset it manually on every AP. It is bad deсision